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Let $X$ be a connected subset of real numbers. If every element of $X$ is irrational, then the cardinality of $X$ is

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Let $X$ be a connected subset of real numbers. If every element of $X$ is irrational, then the cardinality of $X$ is 

  1. infinite 
  2. countably infinite
  3. $2$
  4. $1$
in Real Analysis by Expert | 268 views

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